CVE-2021-45339
HIGHAvast Antivirus < 20.4 - Privilege Escalation via Process Hollowing
Title source: llmDescription
Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by "hollowing" trusted process which could lead to the bypassing of Avast self-defense.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_misc
https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0
Exploit, Third Party Advisory x_refsource_misc
https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0
Scores
CVSS v3
7.8
EPSS
0.0032
EPSS Percentile
23.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-863
Status
published
Products (1)
avast/antivirus
< 20.4
Published
Dec 27, 2021
Tracked Since
Feb 18, 2026